body{

    margin : 0;
}

#game{

    position: absolute;
    left : 0;
    top: 0;
    width: 320px;
    background-color: rgb(30, 30, 30);

}

#game .screen{

    position: absolute;
    width: 100%;
    height: 100%;
    display: none;
    z-index: 10;

}

#game .screen.active{
display: block;


}